import { NavLink, useNavigate } from 'react-router-dom'
import { PanelLeftClose, PanelLeftOpen } from 'lucide-react'
import { NAV_ITEMS } from '@/config/navigation'
import { useUiStore } from '@/app/store/ui'
import { useAuthStore } from '@/app/store/auth'
import { usePermission } from '@/hooks/usePermission'
import { useI18n } from '@/i18n'
import { cn } from '@/utils/cn'
import { getPlan } from '@/config/pricingPlans'
import { Progress } from '@/components/ui/feedback'
import { Avatar } from '@/components/ui/avatar'
import { useQuery } from '@tanstack/react-query'
import { getBilling } from '@/services/api/org'

export function Sidebar() {
  const { sidebarCollapsed, toggleSidebar, setMobileNavOpen } = useUiStore()
  const { t } = useI18n()
  const { can } = usePermission()
  const tenant = useAuthStore((s) => s.tenant)
  const user = useAuthStore((s) => s.user)
  const navigate = useNavigate()

  const { data: billing } = useQuery({ queryKey: ['billing'], queryFn: getBilling, staleTime: 300_000 })
  const plan = getPlan(billing?.info.planKey ?? tenant?.plan ?? 'pro')
  const msgUsage = billing?.info.usage.messages
  const usagePct = msgUsage ? Math.round((msgUsage.used / msgUsage.total) * 100) : 0

  const items = NAV_ITEMS.filter((item) => !item.permission || can(item.permission))
  const groups = [
    { key: 'core', label: '核心业务' },
    { key: 'intelligence', label: '知识与洞察' },
    { key: 'admin', label: '企业管理' },
  ] as const

  return (
    <aside
      className={cn(
        'relative z-30 flex h-full flex-col border-e border-slate-200 bg-white shadow-[6px_0_24px_-22px_rgba(15,23,42,.45)] transition-[width] duration-200',
        sidebarCollapsed ? 'w-[68px]' : 'w-[236px]',
      )}
    >
      {/* Logo */}
      <div
        className="flex h-16 cursor-pointer items-center gap-2.5 border-b border-slate-100 px-4"
        onClick={() => navigate('/dashboard')}
      >
        <img src="/brand-mark.svg" alt="" className="h-9 w-9 shrink-0 rounded-xl shadow-sm shadow-primary-900/10" />
        {!sidebarCollapsed && (
          <div className="min-w-0">
            <p className="truncate text-[15px] font-semibold tracking-tight leading-tight">{t('app.name')}</p>
            <p className="truncate text-[11px] text-muted-foreground leading-tight">{t('app.slogan')}</p>
          </div>
        )}
      </div>

      {/* 导航 */}
      <nav className="flex-1 overflow-y-auto px-2.5 py-3 scrollbar-thin">
        {groups.map((group) => {
          const groupItems = items.filter((item) => item.group === group.key)
          if (!groupItems.length) return null
          return (
            <div key={group.key} className="mb-3">
              {!sidebarCollapsed && (
                <p className="mb-1.5 px-3 pt-2 text-[10px] font-semibold uppercase tracking-[0.14em] text-slate-400">
                  {group.label}
                </p>
              )}
              <div className="space-y-1">
                {groupItems.map((item) => (
          <NavLink
            key={item.key}
            to={item.path}
            onClick={() => setMobileNavOpen(false)}
            title={sidebarCollapsed ? t(item.labelKey as never) : undefined}
            className={({ isActive }) =>
              cn(
                'group relative flex items-center gap-3 rounded-[10px] px-3 py-2.5 text-[13px] transition-all duration-150',
                isActive
                  ? 'bg-primary-50 font-semibold text-primary-800 shadow-[inset_0_0_0_1px_rgba(37,99,235,.1)] before:absolute before:inset-y-2 before:left-0 before:w-[3px] before:rounded-r-full before:bg-primary-600'
                  : 'text-slate-600 hover:bg-slate-50 hover:text-slate-950',
                sidebarCollapsed && 'justify-center px-0',
              )
            }
          >
            <item.icon className="h-[18px] w-[18px] shrink-0" />
            {!sidebarCollapsed && <span className="truncate">{t(item.labelKey as never)}</span>}
          </NavLink>
                ))}
              </div>
            </div>
          )
        })}
      </nav>

      {/* 底部：套餐与企业信息 */}
      {!sidebarCollapsed && (
        <div className="border-t border-slate-100 p-3">
          <div className="rounded-[12px] border border-slate-200 bg-slate-50/80 p-3">
            <div className="flex items-center justify-between">
              <span className="text-xs text-muted-foreground">{t('sidebar.currentPlan')}</span>
              <span className="text-xs font-medium text-primary-700">{plan.name}</span>
            </div>
            <div className="mt-2">
              <div className="mb-1 flex justify-between text-[11px] text-muted-foreground">
                <span>{t('sidebar.usage')}（消息）</span>
                <span>{usagePct}%</span>
              </div>
              <Progress value={usagePct} />
            </div>
            <button
              onClick={() => navigate('/billing')}
              className="mt-2 text-xs font-medium text-primary hover:underline"
            >
              升级套餐 →
            </button>
          </div>
          <div className="mt-3 flex items-center gap-2 px-1">
            <Avatar name={user?.name ?? '?'} size="sm" online />
            <div className="min-w-0 flex-1">
              <p className="truncate text-xs font-medium">{tenant?.name ?? '—'}</p>
              <p className="truncate text-[11px] text-muted-foreground">
                {user?.name} · {user?.title}
              </p>
            </div>
          </div>
        </div>
      )}

      {/* 收起按钮 */}
      <button
        onClick={toggleSidebar}
        className="hidden h-10 items-center justify-center gap-2 border-t border-border text-xs text-muted-foreground hover:bg-muted hover:text-foreground lg:flex"
      >
        {sidebarCollapsed ? <PanelLeftOpen className="h-4 w-4" /> : <PanelLeftClose className="h-4 w-4" />}
        {!sidebarCollapsed && <span>{t('sidebar.collapse')}</span>}
      </button>
    </aside>
  )
}